1-866-215-7781 is a dangerous and malicious number. The pop up window appears in Chrome (or other well-known browsers) displays error #268D3 and blocks your Chrome. It is a very annoying. Then, it offers to call to fake support. Actually, you should not believe such pop up alerts. Error #268D3 is scam. It is designed to trick users and generate income for its developers. In fact, 1-866-215-7781 pop up virus is related with adware. You may delete it using our removal guide.